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WWDC20 · 14 min · Developer Tools

What’s new in MetricKit

Quickly detect power and performance regressions and troubleshoot app issues when you adopt MetricKit. Discover the latest trackable metrics for your app, including CPU instructions, animation hitches, and exit reasons. And learn about diagnostics in MetricKit that can help you troubleshoot hangs, crashes, and disk writes.

Watch at developer.apple.com ↗

Transcript all transcripts

Code shown on screen · 2 snippets

Using MetricKit swift · at 2:11 ↗ 
import MetricKit

class MySubscriber: NSObject, MXMetricManagerSubscriber {
    
    var metricManager: MXMetricManager?
    
    override init() {
        super.init()
        metricManager = MXMetricManager.shared
        metricManager?.add(self)
    }
    
    override deinit() {
        metricManager?.remove(self)
    }
    
    func didReceive(_ payload: [MXMetricPayload]) {
        for metricPayload in payload {
            // Do something with metricPayload.
        }
    }
    
}
Adopting MetricKit Diagnostics swift · at 8:14 ↗ 
func didReceive(_ payload: [MXDiagnosticPayload]) {
    for diagnosticPayload in payload {
        // Consume diagnosticPayload.
    }
}